I'm also using it. Here with CSM enabled, it also allows me to boot to legacy partitions from UEFI, via airboot, I have one SSD with MBR partitioning. Even went so far at one point as to do a legacy install while in EUFI mode, with biosexternal added to the scanfor line, the legacy partition on the USB stick showed up in rEFIND and other then having to change the boot device in rEFIND to my 500GB SSD, worked fine including reboots.